Page 55 - PCMI Journal December 2021
P. 55
Maintenance Tips For PCM Etching Equipment
Kirk Lauver, Marketing and Customer Lab Manager, Chemcut Corporation, US
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12/6/21
Maintenance Tips For PCM Etching Equipment The Impact Of Chemistry On Maintenance
Black Carbon
Carbon and deposits coating the internal machine parts
Maintenance Tips For PCM Etching Equipment The Impact Of Chemistry On Maintenance
Precipitates, Crystals, and Debris
• Mechanical debris; polyester, resist, dirt, paper, tape
• Precipitates from out of balance or over-used ferric or secondary reactions
• Allowing the specific gravity or pH to rise too far will make precipitates
• Exceeding the holding capacity of the solution, ex. copper in ferric
• Secondary reactions can make; metallic hydroxides, sulfides, etc.
• Crystals can form from side reactions and regeneration
• Sodium chlorate regeneration can form sodium chloride crystals
• Some crystals can be very hard and abrasive.
Issue 138 December 2021 PCMI Journal 55
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